| 摘要 |
A DC to AC power converter comprising not more than four power-switching devices, two diodes, a step-up and isolation transformer, a capacitor-choke filter and a controller. Two power-switching devices (S1,S2) located on the primary side of the transformer are switched to provide alternate cycles of an ac current to the primary side of the transformer, which magnetically couples the ac current to the secondary side of the transformer. Two power-switching devices (S3,S4) on the secondary side of the transformer are switched to alternately allow the forward and return ac currents from the secondary side of the transformer in the output path to a load connected to the output of the DC to AC power converter. The controller can use a pulse width modulated control signal. The converter can be configured for AC grid connection, synchronizing by sensing a timing of the AC grid. A non-electrolytic energy storage capacitor can be coupled to input side and the controller can include a boost or buck converter. |
